Chen Shu-Wei, Zhang Zhi-Cheng, Ma Miaofeng, Zhong Chong-Min, Lee Sang-gi
College of Science, Northwest A&F University , Yangling, Shaanxi 712100, P.R. China.
Org Lett. 2014 Oct 3;16(19):4969-71. doi: 10.1021/ol5024008. Epub 2014 Sep 12.
The Grubbs-Hoveyda ruthenium-carbene complex has been covalently immobilized on ionic magnetic nanoparticles utilizing an imidazolium salt linker. The supported catalyst exhibited excellent catalytic activity for ring-closing metathesis (RCM) and cross-metathesis (CM) in the presence of less than 1 mol % of ruthenium. The catalysts can easily be recovered magnetically and reused up to seven times with minimal leaching of ruthenium species.
利用咪唑盐连接体将格拉布斯-霍维达钌卡宾配合物共价固定在离子磁性纳米颗粒上。负载型催化剂在钌含量低于1 mol%的情况下，对闭环易位反应（RCM）和交叉易位反应（CM）表现出优异的催化活性。这些催化剂可以很容易地通过磁性回收，并可重复使用多达七次，钌物种的浸出量极少。
